Camera Motion Estimation Using Particle Filters. - Symeon Nikitidis; Stefanos Zafeiriou; Ioannis Pitas (VISAPP (2), 2008)

Camera Motion Estimation Using a Novel Online Vector Field Model in Particle Filters. - Symeon Nikitidis; Stefanos Zafeiriou; Ioannis Pitas (IEEE Trans. Circuits Syst. Video Technol., 2008)

Incremental Training of Multiclass Support Vector Machines. - Symeon Nikitidis; Nikos Nikolaidis 001; Ioannis Pitas (ICPR, 2010)

Recent advances in discriminant non-negative Matrix Factorization. - Symeon Nikitidis; Anastasios Tefas; Ioannis Pitas (ACPR, 2011)

Using subclasses in discriminant non-negative subspace learning for facial expression recognition. - Symeon Nikitidis; Anastasios Tefas; Ioannis Pitas (EUSIPCO, 2011)

Facial expression recognition using clustering discriminant Non-negative Matrix Factorization. - Symeon Nikitidis; Anastasios Tefas; Nikos Nikolaidis 001; Ioannis Pitas (ICIP, 2011)

Multiplicative update rules for incremental training of multiclass support vector machines. - Symeon Nikitidis; Nikos Nikolaidis 001; Ioannis Pitas (Pattern Recognit., 2012)

Subclass discriminant Nonnegative Matrix Factorization for facial image analysis. - Symeon Nikitidis; Anastasios Tefas; Nikos Nikolaidis 001; Ioannis Pitas (Pattern Recognit., 2012)

Maximum Margin Discriminant Projections for facial expression recognition. - Symeon Nikitidis; Anastasios Tefas; Ioannis Pitas (EUSIPCO, 2013)

Learning Slow Features for Behaviour Analysis. - Lazaros Zafeiriou; Mihalis A. Nicolaou; Stefanos Zafeiriou; Symeon Nikitidis; Maja Pantic (ICCV, 2013)

Τεχνικές μηχανικής όρασης για τον χαρακτηρισμό εικόνων προσώπου - Symeon Nikitidis (2013)

Merging SVMs with Linear Discriminant Analysis: A Combined Model. - Symeon Nikitidis; Stefanos Zafeiriou; Maja Pantic (CVPR, 2014)

Slow features nonnegative matrix factorization for temporal data decomposition. - Lazaros Zafeiriou; Symeon Nikitidis; Stefanos Zafeiriou; Maja Pantic (ICIP, 2014)

Projected Gradients for Subclass Discriminant Nonnegative Subspace Learning. - Symeon Nikitidis; Anastasios Tefas; Ioannis Pitas (IEEE Trans. Cybern., 2014)

Maximum Margin Projection Subspace Learning for Visual Data Analysis. - Symeon Nikitidis; Anastasios Tefas; Ioannis Pitas (IEEE Trans. Image Process., 2014)

Probabilistic Slow Features for Behavior Analysis. - Lazaros Zafeiriou; Mihalis A. Nicolaou; Stefanos Zafeiriou; Symeon Nikitidis; Maja Pantic (IEEE Trans. Neural Networks Learn. Syst., 2016)

A Joint Discriminative Generative Model for Deformable Model Construction and Classification. - Ioannis Marras; Symeon Nikitidis; Stefanos Zafeiriou; Maja Pantic (FG, 2017)